JPH0720335U - Hydraulic excavator work machine - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a working machine of a hydraulic excavator capable of excavating and leveling underground buried objects, beams and the like without damaging them. [Structure] In a hydraulic power shovel, a bucket 11 is axially attached to the tip of an arm 6 via a slide arm 7 that expands and contracts by driving a telescopic cylinder 14. The telescopic cylinder 14 is embedded in the base arm 7a of the slide arm 7, and the arm body 7b slides along the outer surface of the base arm 7. If the bucket 11 is operated while the telescopic cylinder 14 is driven after the slide arm 7 is horizontal in the vertical hole, excavation and leveling work of the buried object in the ground, for example, the underside of the beam can be easily performed. it can. The slide arm 7 is covered with the arm body 7b on the front end side on which the bucket 11 is attached, so that the sand and sand hardly enter the inside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a hydraulic power shovel work machine capable of excavating a horizontal hole below a structure.

[0002]

[Prior art]

 Hydraulic excavators are widely used for gravel and soil extraction, road construction, farmland maintenance, land preparation, water and sewer construction, building foundation construction, etc. The number of works to excavate and level down gas pipes, U-shaped grooves, or beams that support earth retaining walls without damaging them has increased dramatically. Performing the above operation using a hydraulic excavator may damage the existing arm or boom of the excavator by damaging the existing structure, and only the entrance of the side hole to be excavated can be mechanically excavated. There is no choice but to rely on human power.

[0003]

[Problems to be solved by the device]

 As means for solving the above problems, swing bucket hands for power shovels have been proposed by Japanese Patent Laid-Open Nos. 3-166424 and 3-176514. However, even if the turning bucket hand is used, it is not possible to dig deep horizontal holes. On the other hand, manual work is laborious because the worker must continue excavation in a leaning posture, and work efficiency does not increase. The present invention has been made in view of the above-mentioned conventional problems, and provides a working machine of a hydraulic power shovel capable of excavating and leveling a buried buried object, a cutting beam, etc. under the ground without damaging it. The purpose is to do.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the construction of the hydraulic power shovel working machine according to the present invention is as follows: (1) A boom which is pivotally mounted on an upper revolving structure of the hydraulic power shovel, and a swing at the tip of the boom. An arm movably attached to the arm, a slide arm swingably attached to the end of the arm and extending and contracting by the drive of a telescopic cylinder, and a bucket swingably attached to the end of the slide arm. It is characterized by being equipped. (2) In the configuration of (1) above, the slide arm covers the base arm, the telescopic cylinder embedded in the base arm along the axis of the base arm, and the piston rods of the base arm and the telescopic cylinder. It is characterized by being constituted by an arm body that slides along the outer surface of the base arm, and a bucket cylinder and a bucket drive link mechanism attached to the outer surface of the arm body. (3) In the structure of (1) above, the slide arm is composed of an arm body composed of a hydraulic cylinder, a bucket cylinder attached to the outer surface of the arm body, and a bucket drive link mechanism. The feature is that a bucket is attached to the tip of the bottom side. (4) In the configuration of (2) or (3) above, the bucket cylinder and the bucket drive link mechanism in which the slide arm cylinder that swings the slide arm and the slide arm drive link mechanism are attached to the outer surface of the arm body. It is characterized by being the same as. (5) In the configuration of (1) or (2) above, the arm has an offset mechanism in the left-right direction.

[0005]

[Action]

 According to the above configuration, since the bucket is axially attached to the tip of the arm of the hydraulic power shovel via the slide arm that expands and contracts by the drive of the telescopic cylinder, the telescopic cylinder is driven while the slide arm is horizontal. By manipulating the bucket, it is possible to easily perform horizontal excavation and leveling work under the buried objects in the ground. Since the arm has an offset mechanism for the left-right direction, the lateral width for excavation can be widened. As for the slide arm, the tip end side where the bucket is attached is covered by the arm body, or the hydraulic cylinder is used as the slide arm, and the bucket is attached at the bottom end of the hydraulic cylinder. There is almost no danger of getting caught. In addition, the slide arm cylinder that swings the slide arm and the slide arm driving link mechanism are the same as the bucket cylinder and the bucket driving link mechanism that are attached to the outer surface of the slide arm body. It is possible to easily carry out the work of replacing the bucket that occurs when the slide arm is attached and detached. Furthermore, since the arm has a lateral offset mechanism, it is possible to easily widen the horizontal width of the horizontal excavation and leveling work below the buried object in the ground.

[0006]

【Example】

 An embodiment of a working machine for a hydraulic power shovel according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a working machine of a hydraulic power shovel according to claims 1, 2 and 4, showing a state in which the working machine is lowered in a vertical hole provided between cutting beams. FIG. 2 is a sectional view showing a schematic structure of the slide arm, and FIG. 3 is a schematic side view of the working machine in a horizontal hole excavating posture. In these drawings, the boom 1 is configured to be pivotally mounted on an upper swing body 2 of a hydraulic power shovel and erected by a boom cylinder 3.

An arm 6 is pivotally attached to the tip of the boom 1, and a slide arm 7 is pivotally attached to the tip of the arm 6. Reference numeral 8 is an arm cylinder for rocking the arm 6, and the slide arm 7 is rocked in the front-rear direction by a slide arm cylinder 9 and a slide arm drive link mechanism 10. A bucket 11 is pivotally attached to the tip of the slide arm 7, and the bucket 11 is rocked in the front-rear direction by a bucket cylinder 12 and a bucket driving link mechanism 13. The bucket cylinder 12 is the same as the slide arm cylinder 9, and the bucket driving link mechanism 13 is the same as the slide arm driving link mechanism 10. Therefore, when the slide arm 7 is removed from the arm 6 and the bucket 11 is directly attached to the tip of the arm 6, the slide arm cylinder 9 is used as a bucket cylinder, and the slide arm drive link mechanism 10 is used as it is as a bucket drive link mechanism. can do.

As shown in FIG. 2, the slide arm has a base arm 7a axially attached to the tip of the arm 6, a telescopic cylinder 14 embedded in the base arm 7a along the axis of the base arm 7a, An arm body 7b that covers the base arm 7a and the piston rod 14a of the telescopic cylinder 14 and slides along the outer surface of the base arm 7a. The outer surface of the arm body 7b has a bucket cylinder 12 and a bucket driving mechanism. The link mechanism 13 is provided. In the telescopic cylinder 14, the cylinder portion is entirely embedded in the base arm 7a, and the tip of the piston rod 14a is connected to the inner surface of the tip of the arm body 7b. A bucket 11 is pivotally attached to the outer surface of the tip of the arm body 7b. Further, a dust seal 15 is fitted to the opening at the rear end of the arm body 7b to prevent dirt and sand from entering the gap between the base arm 7a and the arm body 7b.

Next, horizontal drilling by this working machine will be described by taking as an example a case where the lower side of a cross beam is horizontally drilled. In FIG. 1, reference numeral 20 denotes a cross section of a beam that supports the rise of the sheet pile. When digging a horizontal hole, first, the boom 1 is lowered, the bucket 11 is operated with the arm 6 and the slide arm 7 substantially vertical, and a vertical hole is drilled between the cutting beams 20.

After the vertical hole is excavated, the boom 1 is further lowered as shown in FIG. 3, and the slide arm cylinder 9 is driven so that the slide arm 7 becomes horizontal or substantially horizontal while keeping the arm 6 vertical. Then, the telescopic cylinder 14 shown in FIG. 2 is driven to operate the bucket 11 while sliding the arm body 7b in the front-rear direction to perform horizontal excavation or leveling work below the cross beam 20.

FIG. 4 is a side view of a slide arm according to claim 1, claim 3 and claim 4. The slide arm 16 is composed of a hydraulic cylinder, and a bracket 16b having a pin hole for connecting the arm 6 and a pin hole for connecting the slide arm driving link mechanism 10 is provided at the tip of a piston rod 16a of the hydraulic cylinder. The exposed portion of the piston rod 16 a is covered with a bellows 17. The bucket 11 and the bucket driving link mechanism 13 are attached to the tip of the slide arm 16, that is, the bottom of the hydraulic cylinder, and the bucket cylinder 12 is attached to the outer periphery of the hydraulic cylinder. The slide arm cylinder 9 and the bucket cylinder 12 are the same, and the bucket drive link mechanism 13 is the same as the slide arm drive link mechanism 10.

FIG. 5 is a schematic side view of a working machine of a hydraulic power shovel according to claim 5, and FIG. 6 is a schematic side view of the working machine in a horizontal hole excavating posture. In the figure, the same reference numerals as those in the schematic side view of the working machine for the hydraulic power shovel shown in FIG. In these figures, the boom 1 is composed of a first boom 1a, a second boom 1b axially attached to the tip of the first boom 1a, and a third boom 1c axially attached to the front end of the second boom 1b. Has been done. Both ends of the offset cylinder 4 are connected to the side surfaces of the second boom 1b and the third boom 1c, respectively. Below the offset cylinder 4, a link rod 5 connecting the side surfaces of the first boom 1a and the third boom 1c is connected. An offset mechanism is constituted by the third boom 1c and the third boom 1c can be offset left and right with respect to the first boom 1a.

Next, horizontal drilling by the working machine will be described by taking as an example a case where the lower side of the cross beam is horizontally drilled. In FIG. 5, reference numeral 20 denotes a cross section of a beam that supports the rise of the sheet pile. When digging a horizontal hole, first, the first boom 1a is lowered, and the bucket 11 is operated with the arm 6 and the slide arm 7 being substantially vertical to dig a vertical hole between the cutting beams 20.

After excavating the vertical hole, the boom first boom 1a is further lowered as shown in FIG. 6, and the slide arm cylinder 9 is driven so that the slide arm 7 becomes horizontal or substantially horizontal while keeping the arm 6 vertical. . Then, the telescopic cylinder 14 shown in FIG. 2 is driven to operate the bucket 11 while sliding the arm body 7b in the front-rear direction to perform horizontal excavation or leveling work below the cross beam 20. At this time, by driving the offset cylinder 4 and adjusting the direction of the arm 6, the cross-sectional area of the lateral hole can be expanded.

[0015]

[Effect of device]

 As described above, according to the present invention, the bucket is attached to the tip of the arm of the hydraulic power shovel through the slide arm that expands and contracts by the drive of the telescopic cylinder. It is possible to easily perform excavation and leveling work on the lower side of the buried object without damaging the buried object. Therefore, the labor-intensive work by manpower is eliminated, and the work efficiency can be greatly improved. In the slide arm of the present invention, the tip side of which the bucket is attached is covered by the arm body, or the hydraulic cylinder is used as the slide arm, and the bucket is attached to the bottom side of the hydraulic cylinder. There is almost no risk of dirt and sand getting caught in. In addition, the slide arm cylinder that swings the slide arm and the slide arm drive link mechanism have been shared with the bucket cylinder and bucket drive link mechanism that are attached to the outer surface of the slide arm body, so that normal work can be performed. When the slide arm is removed, the work of changing the bucket from the slide arm to the arm can be performed in an extremely short time. In addition, since the bucket was pivotally attached to the tip of the arm of the hydraulic power shovel that has an offset mechanism in the left-right direction via a slide arm that expands and contracts by the drive of the telescopic cylinder, the offset cylinder is driven to adjust the arm direction. By doing so, the cross-sectional area of the lateral hole can be increased.

[Brief description of drawings]

FIG. 1 is a schematic side view of a working machine of a hydraulic power shovel according to claims 1, 2, and 4, showing a state in which the working machine is lowered in a vertical hole provided between cutting beams.

FIG. 2 is a partial cross-sectional view showing a schematic structure of a slide arm.

FIG. 3 is a schematic side view of the working machine in a horizontal hole excavation posture.

FIG. 4 is a side view of a working machine according to claim 1, claim 3 and claim 4;

FIG. 5 is a schematic side view of a working machine of a hydraulic power shovel according to claim 5, showing a state in which the working machine is lowered in a vertical hole provided between the beams.

FIG. 6 is a schematic side view of the work machine when the hydraulic power shovel according to claim 5 is in the horizontal hole excavating posture.

[Explanation of symbols]

 1 Boom 1a 1st Boom 1b 2nd Boom 1c 3rd Boom 2 Upper Revolving Body 4 Offset Cylinder 6 Arm 7,16 Slide Arm 7a Base Arm 7b Arm Body 9 Slide Arm Cylinder 10 Slide Arm Drive Link Mechanism 11 Bucket 12 Bucket Cylinder 13 Bucket Drive Link Mechanism 14 Telescopic Cylinder 14a, 16a Piston Rod

Claims (5)

[Scope of utility model registration request] 1. A boom swingably mounted on an upper swing body of a hydraulic power shovel, an arm swingably mounted on a tip end of the boom, and a swingable shaft mounted on a tip end of the arm. A hydraulic power excavator work machine comprising: a slide arm that expands and contracts when driven by a telescopic cylinder; and a bucket that is pivotally attached to the tip of the slide arm. 2. A slide arm covers a base arm, a telescopic cylinder embedded in the base arm along an axis of the base arm, a piston rod of the base arm and the telescopic cylinder, and extends along an outer surface of the base arm. The working machine for a hydraulic power shovel according to claim 1, comprising an arm body that slides, and a bucket cylinder and a bucket drive link mechanism that are attached to an outer surface of the arm body. 3. A slide arm is composed of an arm body composed of a hydraulic cylinder, a bucket cylinder attached to the outer surface of the arm body, and a bucket drive link mechanism, and a bucket is attached to the bottom end of the hydraulic cylinder. The working machine for a hydraulic power shovel according to claim 1, which is worn. 4. A slide arm cylinder for swinging a slide arm and a slide arm driving link mechanism,
The work machine for a hydraulic power shovel according to claim 2 or 3, wherein the bucket cylinder and the bucket drive link mechanism attached to the outer surface of the arm body are the same. 5. The working machine for a hydraulic power shovel according to claim 1 or 2, wherein the arm has an offset mechanism for the left and right directions.